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日前,新汶矿业集团华丰煤矿研制成功井口推车机,在副井口投入生产使用后,效果非常显著,结束了该矿建矿以来井口人
Recently, Xinwen Mining Group Huafeng Coal Mine successfully developed wellhead cart, put into production in the auxiliary wellhead, the effect is very significant, the mine ended mine people